Can anyone help me on this problem please

-24

Step-by-step explanation:

you wanna start by undoing. Get the x by itself on one side.  In algebra multiplication and division are done first and addition and subtraction are second. in undoing you do this process backwards.

so first add 18 to both sides to keep the equation equal.

this makes  x/ -1.2 = 20

Now undo the division of  -1.2 by multiplying both sides by -1.2 which then gives you your answer

x= -24

47 - 90 = 43

43 - 180 = x

x = 137

not sure but it may be b, as i said i'm not sure.